Quasar feedback survey: molecular gas affected by central outflows and by ~10-kpc radio lobes reveal dual feedback effects in 'radio quiet' quasars
Quasar feedback survey: molecular gas affected by central outflows and by ~10-kpc radio lobes reveal dual feedback effects in 'radio quiet' quasars
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类星体反馈调查：受中心流出和 ~10-kpc 射电波瓣影响的分子气体揭示了“射电安静”类星体中的双重反馈效应
DOI：
10.1093/mnras/stad3453
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发表时间：
2024
影响因子：
4.8
通讯作者：
Girdhar A
中科院分区：
文献类型：
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作者：
Girdhar A
我们利用阿塔卡马大型毫米/亚毫米波阵列的数据，通过CO（3-2）追踪了四个z < 0.2的“射电宁静”2型类星体（Lbol 1045.3-1046.2erg s-1;LWHz-1）的分子气体。目标被选择为具有扩展的射电瓣（≥ 10 kpc）和紧凑的中等功率喷流（1-10 kpc;Pjet = 1043.2-1043.7erg s−1）。所有的目标都显示出中央分子外流的证据，或注入湍流，在气体盘（通过CO排放线轮廓中的高速翼组件跟踪）。推断的速度（ε = 250-440 km s−1）和空间尺度（0.6-1.6 kpc）与其他明亮的低红移活动星系核的样本一致。在两个目标中，我们观察到扩展的分子气体结构超出了中央光盘，包含9- 53%的总分子气体质量。这些结构往往是细长的，从核心延伸，并环绕（或沿着）无线电波瓣。它们的性质类似于在最明亮的星系团星系的射电叶（大多是射电叶）周围观察到的分子气体细丝。它们包括：预计距离为5-13 kpc;整体速度为100-340 km s−1;速度弥散为30-130 km s−1;推断质量外流率为4-20 M·s −1;估计动能为1040.3-1041.7erg s−1。我们的观察结果与模拟结果一致，模拟结果表明，中等功率的射流可以通过直接的射流-云相互作用对小尺度的分子气体产生直接（但适度）影响。然后，在更大的尺度上，喷气茧可以把气体推到一边。这两个过程都有助于星星形成的长期调节。
We present a study of molecular gas, traced via CO (3–2) from Atacama Large Millimeter/submillimeter Array data, of fourz< 0.2, ‘radio quiet’, type 2 quasars (Lbol∼ 1045.3–1046.2erg s−1;LWHz−1). Targets were selected to have extended radio lobes (≥ 10 kpc), and compact, moderate-power jets (1–10 kpc;Pjet∼ 1043.2–1043.7erg s−1). All targets show evidence of central molecular outflows, or injected turbulence, within the gas discs (traced via high-velocity wing components in CO emission-line profiles). The inferred velocities (Vout= 250–440 km s−1) and spatial scales (0.6–1.6 kpc), are consistent with those of other samples of luminous low-redshift active galactic nuclei. In two targets, we observe extended molecular gas structures beyond the central discs, containing 9–53 per cent of the total molecular gas mass. These structures tend to be elongated, extending from the core, and wrap-around (or along) the radio lobes. Their properties are similar to the molecular gas filaments observed around radio lobes of, mostly ‘radio loud’, brightest cluster galaxies. They have the following: projected distances of 5–13 kpc; bulk velocities of 100–340 km s−1; velocity dispersion of 30–130 km s−1; inferred mass outflow rates of 4–20 M⊙yr−1; and estimated kinetic powers of 1040.3–1041.7erg s−1. Our observations are consistent with simulations that suggest moderate-power jets can have a direct (but modest) impact on molecular gas on small scales, through direct jet–cloud interactions. Then, on larger scales, jet-cocoons can push gas aside. Both processes could contribute to the long-term regulation of star formation.